Malicious PDF — malware analysis report

Static analysis result for SHA-256 e055549a7f96026c…

MALICIOUS

PDF

57.3 KB Created: 2020-11-09 15:58:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 8ed289ae68c4fea6a7faa519096c7334 SHA-1: 02920b9a7aaf92b21b01b409f9796c0db7923eba SHA-256: e055549a7f96026c490f9af624f895b932c985565ae469b6c961d753edd4b0ed
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafffi.ru/aws?keyword=igf-1+lr3+dosage+bodybuilding PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418583/normal_5f963b16c7205.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387046/normal_5f96953ceb84a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/wepejog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ed43010-3f59-4f1f-a24d-33de6ba7afaa/36134947112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5920bb6c-c93a-4907-a04e-351cf5cb86b4/22401432669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f8203f8-8166-4aba-a3a2-b2e16ed3fa7a/12293988380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/139c3aff-98a1-4252-8850-2d61d517288f/zixanawugezi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01a4cee0-c01c-4307-8b08-5af84f4a7e7d/58404130184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e761a58c-a6d9-4f2d-8628-8ead1de880fd/fexixuwowudux.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/depth_first_search_algorithm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd29badb-db5c-4bb0-83d1-467c73f42677/32304979500.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/rurinidoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21d524ea-44d3-4e02-8c92-a744b2d37c00/onesie_template_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/dicks_return_policy_covid.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000a8dd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA8DD 20096 bytes
SHA-256: d72866c15ac642e7a4e0f9c770a238d1b74d68aa9cca85180aadc8a57260714a
font_00_sfnt_off00007327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7327 5304 bytes
SHA-256: a1b5ce5b1ed4874541e135b40976adc2da28c2c72fdf71cf342a85b10150dd1e
font_01_sfnt_off0000853d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x853D 10368 bytes
SHA-256: 406a2977f26dac5240b5ca1242fdd3881d0099adea707312f728043879bdcfa7
font_03_sfnt_off0000c9f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F0 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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